Tried a tuck flag today, didn't work so well. But I found my weak points, so I have a plan to fix it.
Specifically, my obliques on the top side to pull myself up, as well as what I believe is my serratus on the underside to push myself up. (Side note: I found out recently that those two muscles crossover like interlocking fingers. Not really relevant, but I thought it was cool.)
Anyway, I need some specific work to address these weaknesses. I don't really know of any oblique work where you pull your lower body up, since mostly obliques are worked with twisting exercises. Should I try to find something specific, or just work with general windshield wipers and such?
I can't think of anything that works the scapula the same way, pushing out to the side. I don't even know what it's called. Does anyone have any exercises that train that kind of scapula function? The only thing I can think of is shrugging in a one arm wall handstand, but that seems a bit iffy to me.